I'm surprised Jurrgens has options, but Bills has a full year more service time so I doubt he could be sent down even if the Dodgers wished for it to happen. Jurrgens only has 4 years and a little change in service time.
Billingsley - 5.11 years
Jurrgens - 4.047
Jurrjens never a hard thrower?
Look at some videos from 2010 and earlier. Jurrjens used to average 92-93mph and would hit up to 96mph at times. his fastball had a lot of movement too. There's a video of him striking out Kemp with a 96mph in 2008 I think.
After the all star break last year Jurrjen's velocity fell drastically. He was averaging around 88mph and topping out at 89-90. He got crushed. His stuff also got a lot worse... His slider doesn't nearly have the same bite as it did. His fastball is now straight as an arrow and has even dipped to 86mph a few times this season. His change up no longer has a fade.
Idk what the deal is. He had knee surgery and everything but he still looks like the same dude that got crushed after the all star break last year.